Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

Administering SmartTier

This chapter includes the following topics:

■ About SmartTier

■ Supported SmartTier document type definitions

■ Placement classes

■ Administering placement policies

■ File placement policy grammar

■ File placement policy rules

■ Calculating I/O temperature and access temperature

■ Multiple criteria in file placement policy rule statements

■ File placement policy rule and statement ordering

■ File placement policies and extending files

■ Using SmartTier with solid state disks

About SmartTier

VxFS uses multi-tier online storage by way of the SmartTier feature, which

functions on top of multi-volume file systems. Multi-volume file systems are file

systems that occupy two or more virtual volumes. The collection of volumes is

known as a volume set. A volume set is made up of disks or disk array LUNs

belonging to a single Veritas Volume Manager (VxVM) disk group. A multi-volume

file system presents a single name space, making the existence of multiple volumes

transparent to users and applications. Each volume retains a separate identity

Chapter